A universal charger is another term for a multi-voltage charger. The universal/multi-voltage charger supplied with our Turbo battery packs permits charging of your battery pack anywhere around the world. (Voltage input is100 to 240 vac).
Do NOT use a voltage CONVERTER with a universal charger. With various ac socket configurations used around the world, just make sure you have the proper plug ADAPTER(S) for all the countries you might be visiting. These plug adapters will allow the standard US twin blade ac plug to be plugged into the ac socket of the country you are visiting.